Pt族金属在加压氰化浸出过程中的行为探讨  

DISCUSSION ON BEHAVIOR OF PLATINUM GROUP METALS IN PRESSURE CYANIDE LEACHING

作　　者：黄昆[1] 陈景[1] 

机构地区：[1]昆明贵金属研究所,昆明650221

出　　处：《金属学报》2004年第3期270-274,共5页Acta Metallurgica Sinica

基　　金：国家重点工业试验资助项目计高技[199821657]

摘　　要：对加压氰化浸出过程Pt族金属(Pt,Pd,Rh)行为的研究表明,Pt族金属氰化浸出率的顺序为Pd>Pt>Rh,而相应氰配合物高温下稳定性顺序为Rh≈Pt>Pd浸出过程中的行为规律实际上反映的是表面态Pt族金属的化学反应活性顺序,也即金属的原子态稳定性和金属键强度两种变化规律的综合表现,而Pt族金属氰配合物高温稳定性可以由“重Pt族配合物比相应结构的轻Pt族配合物的热力学稳定性更大,动力学惰性更高”以及金属氰配离子反应活性得到解释。Studies on behavior of platinum-group metals(PGMs) in pressure cyanide leaching indicate that the percent PGM extraction follows the order of Pd > Pt > Rh, while the chemical stability of PGM cyanide complexes at high temperature is Rh approximate to Pt > Pd. The leaching behavior of PGMs could be described by their chemical reaction activity of surface state, and is the synergetic influence of metal-bond strength and atomic-state stability. The high temperature stability of PGM cyanide complexes could be explained from the heavy platinum-group complexes having higher thermodynamic stability and kinetic inertia than light platinum-group complexes with same structure, and from the difference of chemical reaction activity of PGM cyanide complex ions.

关 键 词：Pt族金属 加压氰化 高温氰化 浸出 回收 

分 类 号：TF111.31[冶金工程—冶金物理化学]